Re: Need ideas for a new fuel tank......
If you're mounting that Titan on a rack, behind your seat, then you'll have to keep the tank higher than the carburetor. Keep that in mind with whatever tank you find.
I saw a bike recently where the guy had mounted two tanks saddled over his rear wheel with squeeze bulbs like you see on an outboard motor fuel tank. When the engine tank was empty he just pumped fuel from the saddle tanks back up into the Titan tank. Bulky, but he was into long distance rides.
The beauty of that 4 stroke is that you can pull into any gas station and top off without having to mix fuel/oil.
Good luck. Let us know what you come up with.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"